--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/testsuite/gcc.dg/20020415-1.c	Fri Oct 27 22:46:09 2017 +0900
@@ -0,0 +1,36 @@
+/* PR target/6303
+   This testcase ICEd because s390 did not define
+   ASM_SIMPLIFY_DWARF_ADDR hook.  */
+/* { dg-do compile { target fpic } } */
+/* { dg-options "-O2 -fpic -g" } */
+/* { dg-require-effective-target alloca } */
+
+static inline char *
+bar (unsigned long x, char *y)
+{
+  extern const char ext[];
+  const char *a = ext;
+  char *b = y;
+
+  do *--b = a[x % 10]; while ((x /= 10) != 0);
+  return b;
+}
+
+struct A { char *p, *q; };
+struct B { int r, s; };
+
+int
+foo (struct A *a, const struct B *b)
+{
+  char c[(b->r > b->s) ? b->r : b->s];
+  char *d = &c[sizeof c];
+  register char *e;
+
+  e = bar (b->r, d);
+  while (e < d)
+    {
+      register const int f = *e++;
+      if (((a->p >= a->q) ? 1 : (unsigned char) (*a->p++ = f)) == -1)
+	break;
+    }
+}